Hole saw



FIG. 1 is a perspective view of a hole saw showing the present invention;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines in the figures show structure or boundaries that are not part of the claimed design. 

CLAIM The ornamental design for a hole saw, as shown and described. 